Means for fastening the movements of watches in the cases.



A. J. BAKER.

MEANS FOR FASTENING THE MOVEMENTS 0P WATCHES IN THE GASES; APPLIGATIONFILED DEC. 30, 1911.

1 .037,577. Patented Sept. 3, 1912.

%. W GWOLMM ALLEN J. BAKER, 0F

MEAN$ FOR Specification of Letters Patent. Application filed December30, 1911.

STEWARTSTOWN, PENNSYLVANIA.

FASTENING THE MOVEMENTS OF WATCHES IN THE CASEEL Patented Sept. 3,1912.. Serial No. 668,647.

To all whom 2'25 may concern.

Be it known that I, ALLEN J. BAKER, a citizen of the United States,residing at Stewartstown, in the county of York and State ofPennsylvania, have invented certain new and useful Improvements in Meansfor Fastening the Movements of Watches in the Cases, of which thefollowing is a specification.

My invention relates to improved means for fastening the movements ofwatches in their cases.

common way for holding a watch movement in its case consists inproviding the rear plate of the movement with a screw having aneccentric head, or a broad head with one side out vaway,th saidscrewhead being slotted to permit the engagement of a screw-driver. Thebroad part of the head when turned a certain way overlaps on thecase-rim and thus holds the movement firmly within the case, and whenthe screw.- head is turned to place its cut-away or flat side next tothe case-rim, the movement is released. This familiar device has theobjection that this screw after a time works loose or partly turns byaccident so as to release the screw-head from its engagement with thecase, and then the movement at once becomes loose in the case.

The invention is illustrated in the drawing and will first he describedand then pointed out in the claim.

Figure 1 shows a watch with the back open and exposing to view themovement and -shows the present improvement. Fig. 2 is a view on alarger scale, of the improved lock screw and a screw having aneccentrichead to hold the loclescrew. Fig. 3 is a perspective view ofthe lock screw.

The watch case rim is designated by the numeral, 1, the rear plate ofthe watch movement by 2, the lock screw by 3, and a second screw Whosehead, 4, is eccentric or has a flat cut-away. The watch movement isinserted into the case as usual from the front or dial side, and whenthe movement is in proper position the lock-screw, 3, is inserted so asto cause its head to overlap on the inner flange of the case-rim, 1,which surrounds the movement. This lock screw has a head whose rim isprovided with a plural number of notches or faces, 5; the number ofrim-notches shown in the present instance is eight, but as some othernumber would serve the purpose, the invention,

therefore, is not restricted to The head of this lock-screw may have adiametrical slot to permit theengagement of an ordinary screw-driven,The screw with the head or rim, 4, cutaway or flattened at one sideadjoins the said loclescrew, 3, and these two heads, 3, 4, have suchposition that the round art of the head or rim, 4, will contact with oneof the rim-notches, 5, of the lock-screw, as shown in the drawing, andsuch contact prevents the lock-screw from turning. When it is desired toturn the lock-screw, 3, it is firstnecessary to turn the head, 4, andplace the flattened or cut-away part of its rim alongside of but withouttouching the notches, 5, of the lock-screw, then the lockscrew mayeither be tightened or loosened, or entirely removed. 7

The head, 4, that has a rounded art and a cut-away or flattened part,must e capable of turning or revolving on its center, but it is notessential-that this head shall have a stem provided with a screw-thread.

If it should be desired to take the movement from the case, 1, the firstthing to do is to turn the head, 4, so as to release the rounded part.of its rim from contacting with the notch, 5, of the lock-screw, 3; nextthe screw, 3, must be turned and entirely removed, and then the watchmovement is free to be removed from the case.

This device for fastening watch movements in their cases results inadvantages not afforded by the fastening commonly used. Heretofore theeccentric screw-head on the movement has been employed to over lap therim-flange of the watch-case, and the watch repairer in endeavoring tohold the watch movement tightly has often turned the eccentric-head tobind on the rim-flange so hard as to cause either one of twoobjections-one being to cause the head to indent the soft metal of therim-flange of the case, and thus injure it, and the other being tostrain and w alien the screw where the eccentric-head connects with itsthreaded stem, which shortly otter causes said head to break oli' fromits stem, and the loose head then gets into the moving parts and stopsthe watch. By the use of my device the lock-screw, 3, may be turned sothat its notched head, 5, will merely contact with the rim-flange of thecase without pressing it tightly; this will fasten the movementproperly; then the eccentrici ,a a n head, 4-,Wiii engage one of thenotches on the lock-screw and hold it from becoming loose or turningback. In my device there need not be an indent or injury to therimflange, and as the lock-screw need. not be right there Will be nosuch strain on the head of the lock-screw as to weaken it or cause it tobreak ofi.

i-iaving thus described my invention What It ciaizn and desire "tosecure by Letters Patce for fastening a Watch movement 7 consisting ofthe combination of having the u sual rim-fiange at s-de; aWatch-movement having a with notches, said lock-screw bea took-screwWhose head rim is ALLEN J BAKER.

signature Witnesses CARL N. W

ILEY, C. MILTON Lows.

